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1. HTML, XHTML, and the World Wide Web > Talking the Internet Talk

Talking the Internet Talk

Every computer connected to the Internet (even a beat-up old Apple II) has a unique address: a number whose format is defined by the Internet protocol (IP), the standard that defines how messages are passed from one machine to another on the Net. An IP address is made up of four numbers, each less than 256, joined together by periods, such as 192.12.248.73 or 131.58.97.254.

While computers deal only with numbers, people prefer names. For this reason, each computer on the Internet also has a name bestowed upon it by its owner. There are several million machines on the Net, so it would be very difficult to come up with that many unique names, let alone keep track of them all. Recall, though, that the Internet is a network of networks. It is divided into groups known as


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